Vietnam eSIM

Yes. It roams onto Viettel Mobile, MobiFone and Vinaphone in Vietnam. It is a data-only plan, so your own number stays on your normal SIM for calls and texts.

Plans run from 1 GB up to 50 GB. Prices start at €2.95.

Between 1 and 180 days, depending on the plan you pick. Validity starts on your first data use, not when you buy, so you can install the eSIM before you travel.

Yes, where the local network offers it. The eSIM connects on 3G, 4G and 5G in Vietnam, and your phone picks the fastest available.

Within minutes of payment. The QR code is emailed to the address you give at checkout, and it is also on your order page, so you can install the eSIM before you leave home.

Yes. After installing the eSIM, switch Data Roaming on for the eSIM line in your phone settings. The eSIM works by roaming onto local networks, so it cannot get online with roaming switched off. This does not cost anything extra.

Yes, on any carrier-unlocked phone that supports eSIM. That covers iPhone XR and newer, Samsung Galaxy S20 and newer, Google Pixel 3 and newer, and most other phones released since 2019. To check, look for an EID number under Settings, General, About on iPhone, or dial *#06# on Android.